From 53d9264de4f99a069dd7306f881d28ddd5956b35 Mon Sep 17 00:00:00 2001
From: Dianne Hackborn <hackbod@google.com>
Date: Tue, 13 Apr 2010 12:49:14 -0700
Subject: [PATCH] Fix issue #2555171: Switching to app immediately after
 unmounting...

...SD card causes reboot.

Add option to not include temporarily unavailable recent tasks,
for the recent tasks UI to not display them.

Change-Id: I1495ca217b4292fd56f537459b44c0624262c292
---
 core/java/android/app/ActivityManager.java    |  7 +++++++
 .../server/am/ActivityManagerService.java     | 21 +++++++++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/core/java/android/app/ActivityManager.java b/core/java/android/app/ActivityManager.java
index b3223e5fb6045..c9096cfe6e99c 100644
--- a/core/java/android/app/ActivityManager.java
+++ b/core/java/android/app/ActivityManager.java
@@ -144,6 +144,13 @@ public class ActivityManager {
      */
     public static final int RECENT_WITH_EXCLUDED = 0x0001;
     
+    /**
+     * @hide
+     * TODO: Make this public.  Provides a list that does not contain any
+     * recent tasks that currently are not available to the user.
+     */
+    public static final int RECENT_IGNORE_UNAVAILABLE = 0x0002;
+    
     /**
      * Return a list of the tasks that the user has recently launched, with
      * the most recent being first and older ones after in order.
diff --git a/services/java/com/android/server/am/ActivityManagerService.java b/services/java/com/android/server/am/ActivityManagerService.java
index bc26fa0c6ff8b..b6f323dd0a6b9 100644
--- a/services/java/com/android/server/am/ActivityManagerService.java
+++ b/services/java/com/android/server/am/ActivityManagerService.java
@@ -6867,6 +6867,8 @@ public final class ActivityManagerService extends ActivityManagerNative implemen
             enforceCallingPermission(android.Manifest.permission.GET_TASKS,
                     "getRecentTasks()");
 
+            IPackageManager pm = ActivityThread.getPackageManager();
+            
             final int N = mRecentTasks.size();
             ArrayList<ActivityManager.RecentTaskInfo> res
                     = new ArrayList<ActivityManager.RecentTaskInfo>(
@@ -6883,6 +6885,25 @@ public final class ActivityManagerService extends ActivityManagerNative implemen
                     rti.baseIntent = new Intent(
                             tr.intent != null ? tr.intent : tr.affinityIntent);
                     rti.origActivity = tr.origActivity;
+                    
+                    if ((flags&ActivityManager.RECENT_IGNORE_UNAVAILABLE) != 0) {
+                        // Check whether this activity is currently available.
+                        try {
+                            if (rti.origActivity != null) {
+                                if (pm.getActivityInfo(rti.origActivity, 0) == null) {
+                                    continue;
+                                }
+                            } else if (rti.baseIntent != null) {
+                                if (pm.queryIntentActivities(rti.baseIntent,
+                                        null, 0) == null) {
+                                    continue;
+                                }
+                            }
+                        } catch (RemoteException e) {
+                            // Will never happen.
+                        }
+                    }
+                    
                     res.add(rti);
                     maxNum--;
                 }